SQL plan management (SPM) is designed to prevent performance regression for all SQL statements used by an application (assuming that the SQL statements in...
SQL plan management (SPM) is designed to prevent performance regression for all SQL statements used by an application (assuming that the SQL statements in question are used more than once). SPM uses SQL plan baselines that are associated with individual SQL statements to control what execution plans they are permitted to use. It’s a simple but powerful idea that opens the door to the possibility of using SQL plan baselines in a more selective and reactive way: to influence...
SQL plan management (SPM) is designed to prevent performance regression for all SQL statements used by an application (assuming that the SQL statements in question are used more than once). SPM uses...
If you’re a DBA, it’s likely that you’ve encountered systems where a lot of SQL statements have been hinted almost as a matter of policy. Perhaps you’d like to...
If you’re a DBA, it’s likely that you’ve encountered systems where a lot of SQL statements have been hinted almost as a matter of policy. Perhaps you’d like to figure out if these hints are actually helping. You might like to demonstrate to a development team that they should probably dial down their enthusiasm for micro-managing the Oracle Optimizer. Sometimes, you might want to apply a hints on-the-fly. A while ago, Maria Colgan wrote a couple of posts (here and here) on...
If you’re a DBA, it’s likely that you’ve encountered systems where a lot of SQL statements have been hinted almost as a matter of policy. Perhaps you’d like to figure out if these hints are actually...
